4-1/2" RSD Technologies Abrasive Flap Disc (T29) 60G - 5/8"-11 Nut 

• A thicker disc with larger flaps which conforms to curved and irregulars surfaces, resulting in a consistent finish.
• Flap design results in 30-40 percent longer life than standard flap discs.
• 5/8" - 11 metal nut allows for quick spin-on, spin-off changeover and eliminates cross-threading or sticking to spindle due to heat build-up.
• Best on carbon steel, structural steel, stainless steel, and cast iron.